Sorry to hear that not every kitty has a dungeon to play in. I like mine, I go down all of the time. My box is down there where it is nice and quiet. I can jump onto the shelf that holds the laundry and then up to the next storage shelf. Mum keeps all the stuff she doesn't ever seem to use here. I don't think we have an attic here, or I haven't found it. Mum says we do, but nothing up there but air and insulation to help keep the house warm/cool.
I can sit here and supervise mum as she does the laundry. I always think she needs my help. Make sure she gets all of the stuff washed and dried.
There is a part of the dungeon I that is closed off. Grampie keeps his tools in there. I think if I look hard I could find weather stripping for William to have. Mum says there is too much stuff for me to get into trouble with in there.
This shelf gets me close to the heaty duct and beam, which is just above my head. I haven't gotten stuck yet. The spaces are big enough to let me crawl around, even turn around. So when I need some space to just hang out, I can just head down here. Not much to see, the windows are very small.